Jianzhu Gangjiegou Jinzhan, 2019 为了探究钢管再生混凝土混合柱框架的抗震性能,设计4榀圆钢管再生混凝土混合柱框架并对其进行低周往复荷载试验,以混凝土取代率、柱截面含钢率为参数变量得到混合柱框架的梁端、柱脚及核心区的应变分布规律、滞回曲线和骨架曲线。结果表明,4榀混合柱框架的滞回曲线均饱满呈梭形,说明框架延性性能较好;骨架曲线在进入弹塑性阶段后更平缓,说明框架的耗能能力和抗震性能均较好;梁端塑性铰位置出现在30～90mm范围内,柱脚塑性铰位置出现在40～100mm范围内,说明梁端及柱脚的高应力区存在于这两个位置 ...
闻洋 +3 more
doaj
Shuitu Baochi Xuebao, 2007 2005~2007年在金沙江干热河谷区的云南永胜县退化山地上建植了灌草复合型草地,分析结果表明,灌草复合型种植模式纯利润、经济产投比、土地生产率等的关系大小排序为:"灌 草 藤">"灌 灌">"灌">"草 藤">"草 草">"草">"退化山地荒草坡"。其中"灌 草 藤"模式中的"木豆 非洲狗尾草 高羊茅 大翼豆 白三叶 杂三叶"为最优模式,其纯利润为5 749.8元/(hm2.a),经济产投比242.8%,土地生产率9 469.8元/(hm2.a)。该模式显著地改善了土壤物理性状,降低土壤容重 ...
许岳飞, 毕玉芬, 金晶炜
doaj
Jianzhu Gangjiegou Jinzhan为提高钢桁框体系的抗震可恢复性，提出了自复位钢桁框体系的概念，研究了其在脉冲地震下的强度折减系数。以等效单自由度体系表征具有三折线滞回特征的钢桁框体系，选取182条脉冲型地震动对等效单自由度体系进行非线性动力分析，得到包含6 022万个强度折减系数（R）的数据库，揭示了不同滞回参数和脉冲型地震动对强度折减系数的影响规律。此外，借助BP神经网络拟合强度折减系数在地震下的对数正态分布模型参数，并建立了基于概率的钢桁框体系强度折减系数模型。结果表明提出的模型具有较高的准确性。
刘艳芝, 蓝雅云, 颜阳, 柯珂
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[Treatment of hyperextension-type bicondylar tibial plateau fractures assisted by mirrored three-dimensional printing technology]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiJu W, Li L, Xu L, Li C, Zhou X, Ju J.
europepmc +1 more source
[Research progress on elbow joint rehabilitation robots]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanLi M, Xu F, Wang D, Xu J.
europepmc +1 more source
[Arthroscopic-assisted closed reduction and internal fixation with absorbable screws for Hawkins type <b>Ⅱ</b> talar neck fractures]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiDong Z +6 more
europepmc +1 more source
[Advances in application of digital orthopedic technology in total hip arthroplasty for developmental dysplasia of hip]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhang B, Li H, Li M, Kong X, Chai W.
europepmc +1 more source
[State-of-the-art in peripheral nerve injury diagnosis and therapy]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiSun J, Chen L.
europepmc +1 more source
[Early follow-up study on three-dimensional-printed customized porous acetabular components for reconstructing extensive acetabular bone defects in primary total hip arthroplasty]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiTang S +11 more
europepmc +1 more source
[Retrospective study of fertility in female patients with hematological diseases after allogeneic hematopoietic stem cell transplantation]. [PDF]
Zhonghua Xue Ye Xue Za ZhiHuang JY +5 more
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